Calculating machine



March 15, 1932. E F BRWTEN, JR 1,849,169

CALCULATING MACHINE Filed Sept. 2l, 1929 4 Sheets-Sheet 11| l I l I 1H l Ill I lll j @will/umm@ March 15, 1932. E. F. BRITTEN, .JR 1,849,169

CALCULATING MACHINE Filed Sept. 21, 1929 4 Sheets-Sheet 3 J7/i035' 2/ rjl z- 2 Vll/ lll/lllllllllllll/LLL][II lll/[ll lll/lll l INVENTOR ATT NEY March l5, 1932. E. F. BRITTEN, JR 1,849,169

CALCULATING MACHINE Filed sept. 21, 1929 4 sheets-sheet 4 y. INf/ENTOR @fg/umn @Twcxmfww m A TTOR EY Patented Mar. 15, 1932 UNITED STATES PATENT Iol-'r-'lclz EDWIN F. BRITTEN, JR., OF MAPLEWOOD, NEW JERSEY, ASSIGNOB T MONROE CAL- CULATING MACHINE COMPANY, 0F ORANGE, NEW JERSEY, A. GORPGRATION 0F DELAWARE CALCULATING MACHINE Application led September 21, 1929. Serial No. 394,256.

The invention relates to means whereby a key-set calculating machine may be converted at will for simultaneous key responsive selecting and registering operation.

The invention consists in the novel construction and combination of parts, as set forth in the appended claims. In the accompanying drawings, illustrating the invention Figure 1 is a side elevation, with parts broken away, of the key responsive mechanism of a calculating machine built in accordance with the invention.

Fig. 2 is a front elevation of the same, with the parts broken away.

Fig. 3 is a detail side view of the non-repeat key and associated parts.'

Fig. 4 is a front elevation of the righthand portion of the keyboard, with parts broken away, illustrating a modified form of the invention.

Fig. 5 is a detail front elevation of the nonrepeat mechanism.

Fig. 6 is a plan view of the same.

Fig. 7 is a vertical section through the rear portion of the machine.

Fig. 8 is a detail left-hand elevation of the clutch operating mechanism.

These drawings illustrate the invention as applied to the Monroe calculating machine, disclosed in its essential features in Patent Number 1,566,650, granted to George C. Chase, December 22, 1925. The device of the present application attains certain results set forth in the co-pending application Serial Number 382,7 92, filed August 1, 1929, by Lee R. Brown, such results, however, being applied, according to the present disclosure, to a different use involving modified means.

According to the disclosure of Patent Number 1,566,650 above referred to, motor operation of the machine is controlled by movement of a rock shaft 125 Figs. 1 and 2 of the appended drawings). Shaft 125 is rocked clockwise (Fig. '1) to engage a clutch (11i, 110, 107) and seeth@ machine for additive registration, and is rocked counter clockwise to engage the clutch and set the machine for subtractive registration, these movements of the shaft being controlled by suitable add and subtract keys. In this manner, amounts set up on the keys 18, and thereby upon the column selector bails 19 and differential actuator gears 5, will be registered upon the numeral wheels, the depressed keys 18 being locked in active position by means of a bail 6.

In order to set the machine for key-controlled operation, a button 210 is pressed rearwardly, causing inclined lugs 208 on slide 209, to raise transverse frame members 211 upon which rest the slides 204 and thus liftmg the teeth 203 of such slides into the path of movement of the keystems 18. Depression of a key 18 will now cam the related slide 204 rearwardly, a in 205 of the slide engaging lug 206 of a roc (er arm 207 fast upon shaft 125, this movement causing clockwise rotation of said shaft and additive operation of the machine.

Operation of button 210 to set the machine for key-controlled operation, will also set suitable non-repeat mechanism into active position, this being accomplished by means of a cam lug 212 (Fig. 3) on slide 209, acting upon the pin 213 to rock a lever 214, fulcrumed at 215, in the direction of the arrow. The end of lever 214 engages a slot in the stem of non-repeat key 21, so that the nonrepeat key will be locked in depressed position by pin 213 resting upon the top surface of lug 212. The non-repeat mechanism set by key 21 is of well-known construction, illustrated for example, in United States Reissue Patent Number 16,207. According to this construction, the non-repeat key 21 is provided with a cam slot, adapted to set a lever 14into the path of movement of a cam 16, fast on a driven shaft 'of the machine, said cam, through levers 14 and 15, moving a slide v17 against the locking bails 6, to release the keys. Upon operation 0f the nonrepeat mechanism to release the depressed key'18, the machine will complete the cycle of operation, whereupon the mechanism disclosed in Patent Number 1,566,650, will act to stop the machine.

Means are provided whereby the machine may be set to operate subtractively under the .tontrol of the keys 18, this means comprising a button 200 having connection with a lever 201, fulorumed at 202, and held in either of two adjusted positions by toggle springF 219, said lever havin a pin engaging a slot 217 of the slide 204.-. hen button 200 is in rearwardly adjusted position, the teeth 203 of slide 204 will present forwardly inclined cam surfaces to the stems of the keys 18. When, however, button 200 is drawn torwardly, slide 204 will be adjusted to bringa the rearwardly inclined cam faces of the teeth 203 beneath the keystems, so that depression o a key 18 will now move slide 204 forwardly, bringing `pin 205 in Contact the lug 221 of rock arm 207, to rock shaft in a counter clockwise (or subtractive) direction as View in lllia'ure l.

The machine may be ire-conditioned 'lier key-set operation by drawina' button 210 and slide 209 Yforwardly, removingr the lugs Q08 trein beneath the trame members Q11, thus permitting' the `traine to drop and lower teeth Q05 out or" the path of movement ot the `keystems 18.

l claim:

l. ln a calculating; machine having operatiin;n means includinf;1 member operable by a single manipulative movement to fletermine and initiate positive or negative istrat-ion; an item .re/y, and devices nianuaay settable to determine positive or negative is'erinp; operation or non-operation of saiW ineinliier by said rey.

53. lin a calculating; machine harina' nieral wh eels and plurf lilly of han oi rte-in lrys each settable te d rinine a Value to be registered: adiu. hier eans related o one initiating action ot the maf ol said banks :td chine upon depression of amY item key ciE said bank 'to register upon said wheels all values represented by the depressed keys. adjustable means Yfor releasingl the set keys after the determination oi" a single registration ot the key values. and a device manually operable just said initiating' means and said releasing' means simultaneously to operative position.

3. ln a calculating' machine having numeral wheels, a plurality ot banks of item keys each settable to determine a value to be repristered: means related to one of said banks for initiating action ot the machine upon depression of any item key of said bank to register upon said wheels all values represented by the depressed keys, and means manually adjustable to set the last named means to operative or non-operative osition.

Ll. In a calculating mac ine having numeral wheels and a plurality of banks of item keys each settable to determine a value to be registered; means related to one of said banks for initiating action of the machine upon depression of any item key of said bank to register upon said Wheels all values represented by the depressed keys, and means manually adjustable to set the last namedvrneans to de- 

